Valve



F. w. W000.

VALVE. I

' No. 6l2,890. Patented 001:; 25, I898.

(Application filed Feb. 81, 1898.) (N0 Model.) 7 2 Sheath-Shoat I I at,1 ,J.

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Patented Oct. 25, I898. F. W. WOOD.

No. 6l2,890.

VALVE.

A umiozi filed Feb. 21, 1898.) I

(N0 Model.)

INVENTOE W/ TNE SSE S &1 (yaw WWW Gamma UNITED STATES PATENT FREDERICKIV. IVOOD, OF BALTIMORE, MARYLAND.

VALVE.

SPECIFICATION forming part of Letters Patent No. 612,890, dated October25, 1898.

Application filed February 21, 1898. Serial No. 671,061- (No model.)

To all whom it may concern:

Be it known that I, FREDERICK W. W001), of the city of Baltimore, in theState of Maryland, have invented a new and useful Improvement in Valves,of which the following is a specification.

This invention relates to an improvement in valves designed moreparticularly, but not necessarily, for use in pumps working at highpressures. Certain valves for use in this connection depend for theirefficiency upon the fit of two metallic or rigid surfaces combined witha pliable flap adapted to rest over the intervening joint, the pressureof the fluid serving to hold the flap tightly and firmly over the joint,thereby preventing any leakage. In practice it may happen that duringthe movements of the valve this flap, when very flexible, may be caughtbetween the valve and its seat, thereby interfering with the properaction of the valve and causing objectionable leakage. The aim of thisinven tion is to overcome the liability of the flap acting in thismanner, so as to admit of the use of a flap of very flexible material.

To this end my invention consists in combining with a rigid valve-seatand a rigid valve adapted to close against the seat a pliable strip orflap connected to one of said parts and adapted to rest over theintervening joint and means applied to the free edge of the flap toconfine it in place and prevent its being caught between the valve andthe seat.

The invention also consists in the details of construction andcombination of parts hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a central section through avalve and its seat, showing my invention applied thereto. Fig. 2 is atop plan viewof the same. Fig. 3 is a central section through a valvehaving my inwhich is confined between the base and washer 4 and whichextends outward over the intervening joint between the valve and itsseat. This flap is ring-like in form, its central opening surrounding avertical stud 6, extending upward from the base, and its outer edgeextending beyond the base and upward over the joint between the valveand its seat, then some distance along the conical seat, and finallyinward horizontally over the edge of the washer 4, on which its edge isclamped by a clamping-washer 7, slipped over the stud G and held bymeans of a nut 8, applied to the threaded end of the stud. Both thewashers are "provided with holes 9 and 10 to admit of the pressure ofthe fluid acting on the flap where it overlies the intervening jointbetween the valve and the valve-seat, the holes in the washer at beingarranged opposite the joint, as clearly shown in Fig. 1.

As a result of the above construction and the confining of the outeredge of the flap the latter will be effectually prevented in any mannerfrom turning or folding and being caught between the valve and its seat,as may happen when the edge of the flap is free. Further, theconstruction and arrangement described admit of the use of a flap ofvery flexible material, which is advantageous in that its pliabilityenables the pressure of the fluid to hold it firmly and tightly over thejoint.

I11 Figs. 3 and 4 the construction and arrangement of the parts of thevalve are the same as those just described, except as to the manner ofconfining or retaining the outer edge of the flap. In this case insteadof clamping the edge between the washers it is held in place and free ofthe valve-seat by means of a still? wire ring 11, embedded in the edgeof the flap, as clearly shown. The size of this ring is such that itwill hold the edge of the flap over the washer, in which position therewill be noliability whatever of its catching between the valve and itsseat.

It will of course be understood that various changes may be made in theform of the valve and the flap and other partswithout departing from thelimits of my invention, the essence of which resides in the combination,with the rigid valve and valveseat, of a pliable flap fixed to one ofsaid parts and means for retaining its free edge in position to preventit from catching between the valve and its seat.

Having thus described my invention,what I claim is 1. In a valve thecombination of a rigid valve-seat, a rigid valve arranged to closeagainst the same, a pliable flap attached to one of said members andextending over the intervening joint, and means for holding the freeedge of the flap.

2. In a valve the combination of a rigid valve-seat, a rigid valvearranged to close against the same, a pliable ring-like flap having itsinner edge fixed to the valve and extending out over the interveningjoint between the valve and seat, and a device for retaining the outeredge of the flap.

3. In a valve the combination of a rigid valve-seat, a rigid valvearranged to close against the same, a pliable ring-like flap confined atitsinner edge on the valve and extending out over the joint and a washerapplied to the valve and binding on the outer edge of the flap andacting to hold the same in position.

4:. In a valve the combination of a rigid valve-seat, a rigid valvearranged to close against the same, and a pliable flap applied to one ofsaid members to seal the intervening joint, said flap having both itsedges confined.

In testimony whereof I hereunto set my hand this 16th day of February,1898, in the presence of two attesting witnesses.

FREDERICK WV. WOOD.

Witnesses:

FELIX R. SULLIVAN, G. D. NEAVITT.

